121400353213 has 2 divisors, whose sum is σ = 121400353214. Its totient is φ = 121400353212.

The previous prime is 121400353189. The next prime is 121400353229. The reversal of 121400353213 is 312353004121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78018545124 + 43381808089 = 279318^2 + 208283^2 .

It is an emirp because it is prime and its reverse (312353004121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121400353213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121400353013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60700176606 + 60700176607.

It is an arithmetic number, because the mean of its divisors is an integer number (60700176607).

Almost surely, 2^121400353213 is an apocalyptic number.

It is an amenable number.

121400353213 is a deficient number, since it is larger than the sum of its proper divisors (1).

121400353213 is an equidigital number, since it uses as much as digits as its factorization.

121400353213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 121400353213 its reverse (312353004121), we get a palindrome (433753357334).

The spelling of 121400353213 in words is "one hundred twenty-one billion, four hundred million, three hundred fifty-three thousand, two hundred thirteen".